Traction-wheel.



e. P O HL.

TRACTION WHEEL.

APPLICATION FILED FEB. 12. 19I5.

1,192,345. Patented July 25,1916.

i/L AMM: JWMM GUSTAV rorrn, or GOSSNITZ, GERMANY;

TRACTION-WHEEL.

Specification of Letters Patent.

Application filed February 12, 1915. Serial No. 7,767.

Traction-VVheels, of which the following is a specification.

The mam driving wheels of the motorplows are constructed as gripper-wheels,

whereby the gripper points or gripper shovels are pushed forward and drawn back by radially directed arms. It is a known construction to link these arms to an adjusting ring, which is mounted concentrically to the axle of the wheel. In order to turn this adjusting ring a special leversystem is employed, producing a great number of fulcrums which are exposed to considerable strain and wear, especially because it is impossible to protect them against dust. But the action oi the driving wheels depends entirely on the correct adjustment of the arms.

According to the present invention the ring, to which the gripper-arms are linked, is provided with internal teeth, by which it engages an annular groove of the hub and may be adjusted by a pinion mounted in the hub.

The present invention is shown in the accompanying drawing, in which Figure 1 shows part-of a gripper-wheel in elevation, some parts of the wheel being shown in section; Fig. 2 is a top view partly in section. I

In the form shown on the drawing the wheel proper A, supported by the spokes B, consists of two angular wheel rims A A kept at the required distance from each other by cross braces O. The grippers D are radially mounted between the two wheel rims. The grippers are made of sheets of steel or another suitable material, which have the form of spades and are strengthened by longitudinal ribs D D which may be pressed out of the steel sheet in the form of hollow ribs.

The shovel-shaped ends of the grippers I) must be guided through the rim. To effect this, pivotally mounted guides E with slits, through which the gripper-plates D project, are employed in the present case. In the form illustrated the guides have the form of cylindrical bolts, whose pins are guided in the rims A A of the wheel. These guides may be constructed of a single piece or they may be employed as elements which are longitudinally split into two parts. They must be mounted in the rims in such a manner, that they may carry out an unhampered rotation, in order to be able to follow the different positions of the gripper-plates D. For adjusting the grippers D their arms F are linked by bolts I pivotally mounted on a ring G, concentric with the axle H of the wheel. By a slight turning of the ring the arms may be brought into the position indicated by dotted lines and the grippers D may be drawn ba-ck. The guide-bolts E allow of this slanting position, because they are themselves pivotally mounted in the casing of the wheel.

According to the present invention the ring G is provided with internal teeth which engage the annular groove of the hub K.

A pinion L, pivotally mounted inside the hub, engages the internal gearing of the ring. By a turning ofthe gear the ring Gr is consequently adjusted. e

As only a. partial turning of the ring G is required, it is necessary to provide the latter only on a portion of its periphery with teeth, while the other portion of the ring may remain plain.

The required position of the grippers may be obtained by adjusting pins. If the ring G is provided, on the one hand, with holes M at determined distances from each other with corresponding holes in the adjacent walls as shown in Fig. 1, the corresponding position of the grippers I) may be secured by an adjusting pin, passing through said holes. The same effect may, however, also be at tained by providing the ring on its entire internal periphery with teeth and employing a wedge N, as shown in Fig. 2, for limiting the position of the grippers, which wedge must be provided with teeth. These teeth engage those of the internal gearing of the ring G, thus obviating its further turning and, consequently, any disarrangement of Patented July 215, 1916.

the arms. This disposition allows of a very precise shifting of the gripper for one tooth at each time.

In the present form the traverses C of the wheel-frame are formed of fiat bar irons ,placed edgewise, in order to make the edges tween the aijoresaid traverses while the plow is driving. The superfluous openings along the periphery of the wheel may be covered by plates A But always a sufiioiently large space must remain in the neighborhood of the shovels D, out of which the earth out rims, said gripper plates passing through the slits and adapted to project beyond the wheel rims.

2. A gripper wheel for motor plows comprising adjustable gripper arms vvith grippers thereon, two angular wheel rims beyond which said grippers reach, traverses spacing the angular portions or" the rim apart, guides pivotally mounted in the walls of the Wheel having slits through which the grippers pass, and inner mechanism for moving the gripper arms with the grippers mounted within the hub of the wheel so as to protect it against clogging by soil.

3. A gripper wheel for motor plows comprising adjustable gripper arms with grippers thereon, two angular Wheel rims beyond which said grippers reach, traverses for spacing said angular portlons, lnner mechanism for moving the gripper arms consisting essentially of a ring to which the grippers are linked having teeth on the iimer surface, and a pinion, said gear mechanism being covered by the said ring. 7

4. In a gripper wheel for motor plows having gripper arms with grippers thereon and angular wheel rims with traverses spacing them apart, an adjusting device for drawing the grippers in and out and consisting essentially of a ring with interior gear and pinion H1BCl12t11lSH1,'21I1Cl means for locking the ring in the adjusted position, so arranged thatthe adjusting device is protected against clogging by soil.

5. In a gripper wheel for motor plows having gripper arms with grippers thereon and angular wheel rims wlth traverses spacing them apart, a guiding device for the grippers composed of cylindrical bolts mounted in the wheel rims and having slits through which the grippers pass, means for drawing said grippers in and out, and means for securing the grippers in the desired position.

Signed at Leipzig, Germany, this 14th day of January, 1915. e

Gusrav POHL;

Witnesses RUDOLPH FRIoKE, OSCAR IRVING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

